Mine dust is one of the main hazards in underground longwall mines worldwide.In order to solve the mine dust problem,a significant number of studies have been carried out regarding longwall mine dust control,both in C...Mine dust is one of the main hazards in underground longwall mines worldwide.In order to solve the mine dust problem,a significant number of studies have been carried out regarding longwall mine dust control,both in China and Australia.This paper presents a comparative study of dust control practices in Chinese and Australian longwall mines,with particular references to statutory limits,dust monitoring methods and dust management practices,followed by a brief discussion on the research status of longwall mine dust control in both countries.The study shows that water infusion,face ventilation controls,water sprays,and deep and wet cutting in longwall shearer operations are commonly practiced in almost all underground longwall mines and that both Chinese and Australian longwall mine dust control practices have their own advantages and disadvantages.It is concluded that there is a need for further development and innovative design of more effective dust mitigation products or systems despite the development of various dust control technologies.Based on the examinations and discussions,the authors have made some recommendations for further research and development in dust control in longwall mines.It is hoped that this comparative study will provide beneficial guidance for scholars and engineers who are engaging in longwall mine dust control research and practice.展开更多
For the first time,assemblage and diversity of aquatic hyphomycetes were investigated in four lateritic cave streams of the southwest coast of India.This study includes physicochemical features of cave habitats and st...For the first time,assemblage and diversity of aquatic hyphomycetes were investigated in four lateritic cave streams of the southwest coast of India.This study includes physicochemical features of cave habitats and stream waters.Species richness,diversity and equitability of aquatic hyphomycetes in foam,water,leaf litter and woody litter(bark and cambium)have been investigated.These cave streams yielded up to 21 species of aquatic hyphomycetes,which is comparable to the population in nearby streams.The leaf litter of cave streams consist of highest number of species,while it was the lowest in the foam samples(15 vs.7 spp.).Cave stream water,bark and cambium consist of 14,11 and 9 species,respectively.Simpson’s and Shannon’s diversities were the highest in water samples,while the Pielou’s equitability was highest in foam samples.The species richness as well as the core-group(highly frequent)aquatic hyphomycetes are comparable with nearby streams.Actinospora megalospora,Anguillospora angulata,A.crassa,Condylospora spumigena,Ingoldiella fibulata and Trinacrium subtile were the new records to the coastal region of southwest India.展开更多
基金supported by the Program for New Century Excellent Talents in University of China(No.NCET-10-0770)the financial support provided by the China Scholarship Council(Nos.201306425002&201406425048)the University of Wollongong to pursue study at the University of Wollongong as undergraduate visiting students
文摘Mine dust is one of the main hazards in underground longwall mines worldwide.In order to solve the mine dust problem,a significant number of studies have been carried out regarding longwall mine dust control,both in China and Australia.This paper presents a comparative study of dust control practices in Chinese and Australian longwall mines,with particular references to statutory limits,dust monitoring methods and dust management practices,followed by a brief discussion on the research status of longwall mine dust control in both countries.The study shows that water infusion,face ventilation controls,water sprays,and deep and wet cutting in longwall shearer operations are commonly practiced in almost all underground longwall mines and that both Chinese and Australian longwall mine dust control practices have their own advantages and disadvantages.It is concluded that there is a need for further development and innovative design of more effective dust mitigation products or systems despite the development of various dust control technologies.Based on the examinations and discussions,the authors have made some recommendations for further research and development in dust control in longwall mines.It is hoped that this comparative study will provide beneficial guidance for scholars and engineers who are engaging in longwall mine dust control research and practice.
文摘For the first time,assemblage and diversity of aquatic hyphomycetes were investigated in four lateritic cave streams of the southwest coast of India.This study includes physicochemical features of cave habitats and stream waters.Species richness,diversity and equitability of aquatic hyphomycetes in foam,water,leaf litter and woody litter(bark and cambium)have been investigated.These cave streams yielded up to 21 species of aquatic hyphomycetes,which is comparable to the population in nearby streams.The leaf litter of cave streams consist of highest number of species,while it was the lowest in the foam samples(15 vs.7 spp.).Cave stream water,bark and cambium consist of 14,11 and 9 species,respectively.Simpson’s and Shannon’s diversities were the highest in water samples,while the Pielou’s equitability was highest in foam samples.The species richness as well as the core-group(highly frequent)aquatic hyphomycetes are comparable with nearby streams.Actinospora megalospora,Anguillospora angulata,A.crassa,Condylospora spumigena,Ingoldiella fibulata and Trinacrium subtile were the new records to the coastal region of southwest India.
